Three echinoid genera are identified from Visean (Mississippian, Lower Carboniferous) rocks of the Peak District, namely Melonechinus Meek &amp; Worthen, Archaeocidaris M'Coy and Lepidocidaris Meek &amp; Worthen. Even the best preserved specimens from this area only occur as a jumble of plates. Melonechinus etheridgei (Keeping) (Chadian? to Brigantian?) has thick test plates; interambulacral plates are commonly hexagonal; ambulacra include multiple columns of pore pairs; and plate surfaces bear many small secondary tubercles. Archaeocidaris sp. or spp. (Chadian? to Brigantian) has long, robust radioles with a smooth shaft and prominent spinules; associated test plates (mainly interambulacra) are considered coeval. Rare Lepidocidaris sp. (Asbian? to Brigantian), including Archaeocidaris glabrispina (Phillips), is only recognized from rare, smooth radioles; test plates resemble those of Archaeocidaris . Lepidocidaris is only known from the platform carbonate shelf of Derbyshire; other echinoid taxa occur on both the shelf succession and the deeper water carbonate succession deposited adjacent to the shelf.

Stephen. K. Donovan

David N. Lewis

Proceedings of the Yorkshire Geological Society

《约克郡地质学会会刊》（PYGS）自 1839 年以来一直不间断出版。它是英国地质学的主要期刊之一。每年都会发行两部分，其中包含有关地质各个方面的原始研究论文。传统上，会议记录特别关注英格兰北部及其邻近地区的地质情况。鼓励提交有关相关主题但具有更普遍兴趣的论文。所有论文都经过两名独立裁判的全面审查。

The Proceedings of the Yorkshire Geological Society (PYGS) has been published continuously since 1839 and is one of the leading journals in the field of geology in the UK. The journal releases two issues each year, featuring original research papers covering various aspects of geology. The conference proceedings particularly focus on the geological conditions of Northern England and its surrounding areas, while also encouraging submissions on related topics of broader interest. All submitted papers undergo thorough review by two independent referees.

《Proceedings of the Yorkshire Geological Society》（PYGS）自1839年起持续出版，是英国地质学领域的重要期刊之一。该期刊每年发行两期，涵盖地质学各个方面的原创研究论文。会议记录部分特别关注英格兰北部及其邻近地区的地质情况，同时也鼓励提交与相关主题但具有更广泛兴趣的论文。所有提交的论文均经过两名独立审稿人的严格评审。

Category	Quartile
地球科学	4
地球科学, 地质学	4

Echinoids (Mississippian, Visean) of the Peak District, Derbyshire and Staffordshire, UK

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